121221101207 has 2 divisors, whose sum is σ = 121221101208. Its totient is φ = 121221101206.

The previous prime is 121221101179. The next prime is 121221101213. The reversal of 121221101207 is 702101122121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221101207 - 2¹⁰ = 121221100183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221101227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610550603 + 60610550604.

It is an arithmetic number, because the mean of its divisors is an integer number (60610550604).

Almost surely, 2^121221101207 is an apocalyptic number.

121221101207 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221101207 is an equidigital number, since it uses as much as digits as its factorization.

121221101207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 121221101207 its reverse (702101122121), we get a palindrome (823322223328).

The spelling of 121221101207 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, two hundred seven".